Small code improvements, and some logging added to better know when successful rendering was completed (including Pdf Bytes Size).

Author: cajuncoding

apachefop-serverless-az-func/src/main/java/com/cajuncoding/apachefop/serverless/apachefop/ApacheFopRenderResult.java

@@ -7,7 +7,7 @@ public class ApacheFopRenderResult {
     private final ApacheFopEventListener eventListener;
 
     public ApacheFopRenderResult(byte[] pdfBytes, ApacheFopEventListener eventListener) {
-        this.pdfBytes = pdfBytes;
+        this.pdfBytes = pdfBytes != null ? pdfBytes : new byte[0];
         this.eventListener = eventListener;
     }
 

apachefop-serverless-az-func/src/main/java/com/cajuncoding/apachefop/serverless/apachefop/ApacheFopRenderer.java

@@ -10,9 +10,7 @@
 import org.apache.fop.apps.*;
 import org.apache.fop.configuration.ConfigurationException;
 import org.apache.fop.configuration.DefaultConfigurationBuilder;
-import org.xml.sax.SAXException;
 
-import javax.xml.parsers.ParserConfigurationException;
 import javax.xml.transform.*;
 import javax.xml.transform.sax.SAXResult;
 import javax.xml.transform.stream.StreamSource;
@@ -94,8 +92,6 @@ public ApacheFopRenderResult renderPdfResult(String xslFOSource, boolean gzipEna
         }
     }
 
-
-
     protected synchronized void initApacheFopFactorySafely() {
         if(staticFopFactory == null) {
             var baseUri = new File(".").toURI();
@@ -104,7 +100,7 @@ protected synchronized void initApacheFopFactorySafely() {
 
             try {
                 String configXmlText = ResourceUtils.loadResourceAsString(configFilePath);
-                if (!StringUtils.isBlank(configXmlText)) {
+                if (StringUtils.isNotBlank(configXmlText)) {
 
                     //When Debugging log the full Configuration file...
                     if(this.apacheFopConfig.isDebuggingEnabled()) {

apachefop-serverless-az-func/src/main/java/com/cajuncoding/apachefop/serverless/config/ApacheFopServerlessConfig.java

@@ -83,7 +83,7 @@ protected void readRequestQueryParamsConfig(Map<String, String> queryParams) {
 
         //Determine if Event Log Dump mode is enabled (vs PDF Binary return).
         this.eventLogDumpModeEnabled = BooleanUtils.toBoolean(
-                queryParams.getOrDefault(ApacheFopServerlessQueryParams.EventLogDump, null)
+            queryParams.getOrDefault(ApacheFopServerlessQueryParams.EventLogDump, null)
         );
 
     }

apachefop-serverless-az-func/src/main/java/com/cajuncoding/apachefop/serverless/utils/TextUtils.java

@@ -18,10 +18,6 @@ public static String getCurrentW3cDateTime() {
         return currentW3cDateTime;
     }
 
-    public static boolean isNullOrWhiteSpace(String value) {
-        return value == null || value.isBlank();
-    }
-
     /**
      * Truncates a string to the number of characters that fit in X bytes avoiding multi byte characters being cut in
      * half at the cut off point. Also handles surrogate pairs where 2 characters in the string is actually one literal

apachefop-serverless-az-func/src/main/java/com/cajuncoding/apachefop/serverless/web/ApacheFopServerlessFunctionExecutor.java

@@ -92,6 +92,9 @@ protected <TRequest> HttpResponseMessage ExecuteRequestInternal(
         //Execute the transformation of the XSL-FO source content to Binary PDF format...
         var pdfRenderResult = fopHelper.renderPdfResult(xslFOBodyContent, config.isGzipResponseEnabled());
 
+        //Add some contextual Logging so we can know if the PDF bytes were rendered...
+        logger.info(MessageFormat.format("[SUCCESS] Successfully Rendered PDF with [{0}] bytes.", pdfRenderResult.getPdfBytes().length));
+
         //Render the PDF Response (or EventLog Dump if specified)...
         var response = config.isEventLogDumpModeEnabled()
                 ? responseBuilder.BuildEventLogDumpResponse(pdfRenderResult, config)

apachefop-serverless-az-func/src/main/java/com/cajuncoding/apachefop/serverless/web/SafeHeader.java

@@ -1,7 +1,8 @@
 package com.cajuncoding.apachefop.serverless.web;
 
 import com.cajuncoding.apachefop.serverless.http.HttpEncodings;
-import com.cajuncoding.apachefop.serverless.utils.TextUtils;
+
+import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.text.StringEscapeUtils;
 
 import java.io.UnsupportedEncodingException;
@@ -19,10 +20,10 @@ public SafeHeader(String value, String encoding) throws UnsupportedEncodingExcep
     public String getValue() { return value; }
 
     protected String sanitizeTextForHttpHeader(String value, String encoding) throws UnsupportedEncodingException {
-        if(TextUtils.isNullOrWhiteSpace(value))
+        if(StringUtils.isBlank(value))
             return value;
 
-        if(encoding != null && encoding != HttpEncodings.IDENTITY_ENCODING)
+        if(StringUtils.isNotBlank(encoding) && !encoding.equalsIgnoreCase(HttpEncodings.IDENTITY_ENCODING))
             return value;
 
         //BBernard - 09/29/2021